EUNIS habitat type hierarchical view (marine version 2022 & terrestrial version 2021)

The EUNIS habitat classification review is on-going. Four groups are pending review: Inland waters, Wetlands, Constructed, industrial and other artificial habitats and Complexes.

• M : Marine benthic habitats (MA-MG)
  
• MH : Pelagic water column
  
• MJ : Ice-associated marine habitats
  
  • MJ1 : Sea ice
    
  • MJ2 : Freshwater ice
    
  • MJ3 : Brine channels
    
  • MJ4 : Under-ice habitat
    
• N : Coastal habitats
  
• Q : Wetlands
  
• R : Grasslands and lands dominated by forbs, mosses or lichens
  
• S : Heathland, scrub and tundra
  
• T : Forest and other wooded land
  
  • T1 : Deciduous broadleaved forest
    
  • T2 : Broadleaved evergreen forest
    
  • T3 : Coniferous forest
    
    • T31 : Temperate mountain Picea forest
      
    • T32 : Temperate mountain Abies forest
      
      • T321 : Neutrophile medio-European Abies forests
        
      • T322 : Calciphilous Abies alba forests
        
      • T323 : Acidophilous Abies alba forests
        
      • T324 : Corsican Abies alba forests
        
      • T325 : Moesian Abies alba forests
        
      • T326 : Abies reforestation
        
      • T327 : Picea abies reforestation
        
      • T328 : Serpentine Abies alba forests
        
    • T33 : Mediterranean mountain Abies forest
      
    • T34 : Temperate subalpine Larix, Pinus cembra and Pinus uncinata forest
      
    • T35 : Temperate continental Pinus sylvestris forest
      
    • T36 : Temperate and submediterranean montane Pinus sylvestris-Pinus nigra forest
      
      • T361 : Southeastern European Pinus sylvestris forests
        
      • T362 : Po terrace Pinus sylvestris forests
        
      • T363 : Ponto-Caucasian Pinus sylvestris forests
        
      • T364 : Supra-Mediterranean Pinus sylvestris forests
        
      • T365 : Alpino-Apennine Pinus nigra forests
        
      • T366 : Western Balkanic Pinus nigra forests
        
      • T367 : Pinus pallasiana and Pinus banatica forests
        
      • T368 : Pinus sylvestris forest on chalk in the steppe zone
        
      • T369 : Pinus nigra reforestation
        
    • T37 : Mediterranean montane Pinus sylvestris-Pinus nigra forest
      
    • T38 : Mediterranean montane Cedrus forest
      
    • T39 : Mediterranean and Balkan subalpine Pinus heldreichii-Pinus peuce forest
      
    • T3A : Mediterranean lowland to submontane Pinus forest
      
    • T3B : Pinus canariensis forest
      
    • T3C : Taxus baccata forest
      
    • T3D : Mediterranean Cupressaceae forest
      
    • T3E : Macaronesian Juniperus forest
      
    • T3F : Dark taiga
      
    • T3G : Pinus sylvestris light taiga
      
    • T3H : Larix light taiga
      
    • T3J : Pinus and Larix mire forest
      
    • T3K : Picea mire forest
      
    • T3L : Coniferous self sown forest of non site-native trees
      
    • T3M : Coniferous plantation of non site-native trees
      
    • T3N : Coniferous plantation of site-native trees
      
  • T4 : Lines of trees, small anthropogenic forests, recently felled forest, early-stage forest and coppice
    
• U : Inland habitats with no or little soil and mostly with sparse vegetation
  
  • U1 : Terrestrial underground caves, cave systems, passages and waterbodies
    
  • U2 : Screes
    
  • U3 : Inland cliffs, rock pavements and outcrops
    
    • U31 : Boreal and arctic siliceous inland cliff
      
    • U32 : Temperate high-mountain siliceous inland cliff
      
    • U33 : Temperate, lowland to montane siliceous inland cliff
      
    • U34 : Mediterranean siliceous inland cliff
      
    • U35 : Boreal and arctic base-rich inland cliff
      
    • U36 : Temperate high-mountain base-rich inland cliff
      
    • U37 : Temperate, lowland to montane base-rich inland cliff
      
    • U38 : Mediterranean base-rich inland cliff
      
    • U39 : Boreal ultramafic inland cliff
      
    • U3A : Temperate ultramafic inland cliff
      
    • U3B : Mediterranean ultramafic inland cliff
      
    • U3C : Macaronesian inland cliff
      
    • U3D : Wet inland cliff
      
    • U3E : Limestone pavement
      
  • U4 : Snow or ice-dominated habitats
    
    • U41 : Snow pack
      
    • U42 : Ice cap and glacier
      
    • U43 : Rock glacier and unvegetated ice-dominated moraine
      
  • U5 : Miscellaneous inland habitats usually with very sparse or no vegetation
    
  • U6 : Recent volcanic features
    
• V : Vegetated man-made habitats